<template>
  <div class="wrapper">
    <v-head></v-head>
    <v-sidebar></v-sidebar>
    <div class="content-box" :class="{'content-collapse':collapse}">
      <v-tags></v-tags>
      <div class="content">
        <div class="content-padding">
          <transition name="move" mode="out-in">
            <keep-alive :include="tagsList">
              <router-view></router-view>
            </keep-alive>
          </transition>
        </div>
      </div>
      <v-footer></v-footer>
    </div>
  </div>
</template>

<script>
import vHead from "./header.vue";
import vSidebar from "./sidebar.vue";
import vTags from "./tags.vue";
import vFooter from "./footer.vue";
import bus from "./bus.js";
export default {
  data() {
    return {
      tagsList: [],
      collapse: false
    };
  },
  components: {
    vHead,
    vSidebar,
    vTags,
    vFooter
  },
  created() {
    bus.$on("collapse", msg => {
      this.collapse = msg;
    });

    // 只有在标签页列表里的页面才使用keep-alive，即关闭标签之后就不保存到内存中了。
    bus.$on("tags", msg => {
      let arr = [];
      for (let i = 0, len = msg.length; i < len; i++) {
        msg[i].name && arr.push(msg[i].name);
      }
      this.tagsList = arr;
    });
  }
};
</script>
